Alzheimer's tau proteins (IMAGE) Allen Institute Caption This microscopy image shows tau protein protein deposits (brown) in a post-mortem brain tissue sample from an Alzheimer's patient. Credit UW Medicine Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.